ScoreU - Unknown
ScoreF - 20,000-200,000 km squared (about 8,000-80,000 square miles)
Comment128,467 square kilometers based on Natural Heritage Program range maps that appear on the Montana Field Guide
Area of Occupancy
ScoreU - Unknown
ScoreE - Relatively Stable (±25% change)
CommentRiparian deciduous forests and woody draws relatively stable within +/-25% since European arrival.
ScoreU/E - Unknown, but believed to be stable with population, range, area occupied, and/or number or condition of occurrences unchanged or remaining within ±10% fluctuation
CommentNo trend data available due to lack of adequate survey/monitoring effort, but assumed to be relatively stable.
ScoreD - Moderate, non-imminent threat. Threat is moderate to severe but not imminent for a significant portion of the population or area.
CommentHousing development in riparian areas and altered hydrology and grazing leading to the loss of cottonwood forest regeneration, are the greatest threats to the species in Montana.
SeverityModerate - Major reduction of species population or long-term degradation or reduction of habitat in Montana, requiring 50-100 years for recovery.
CommentDeclines in mature forest nest sites will take a long time to recover.
ScopeModerate - 20-60% of total population or area affected
CommentA large portion (>20%) of riparian deciduous forests are decadent.
ImmediacyLow - Threat is likely to be operational within 5-20 years.
CommentThreat is not fully operational now, but some areas have been lost.
ScoreC - Not Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance; or species has high dispersal capability such that extirpated populations soon become reestablished through natural recolonization (unaided by humans).
ScoreB - Narrow. Specialist. Specific habitat(s) or other abiotic and/or biotic factors (see above) are used or required by the Element, but these key requirements are common and within the generalized range of the species within the area of interest.
CommentNarrow Specialist. Uses a broad variety of mature deciduous forests, but rely on relatively large nest cavities.
Raw Conservation Status Score
3.5 + 0.0 (geographic distribution) + 0.0 (environmental specificity) + 0.0 (long-term trend) - 0.25 (threats) = 3.25
How Scores are Calculated